The effects of creatine supplementation on performance and hormonal response in amateur swimmers

作者：Vatani D Sheikholeslami^*; Faraji H; Soori R; Mogharnasi M

来源：Science & Sports, 2011, 26(5): 272-277.

DOI：10.1016/j.scispo.2011.07.003

• Swimmers
• Creatine supplementation
• Anabolic hormones

Objectives. - The purpose of this study was to determine the influence of short-term creatine supplementation on sprint swimming performance (50 and 100 m) and hormonal responses (growth hormone, testosterone and cortisol).
Methods. - Twenty amateur male swimmers ingested creatine monohydrate (CR) or a matched placebo (PL) for 6 days. All subjects performed 6 days, swimming exercise. The subjects were tested for performance and hormonal responses the day before and after this creatine loading.
Results. - The mean swimming time of CR group in 50m was significantly decreased (Before-period: 53.1 +/- 3.73 s, after-period: 50.7 +/- 2.84 s). Growth hormone and cortisol were not affected by this creatine loading. But, testosterone concentration was significantly greater in CR compared to PL after supplementation period (P < 0.05).
Conclusions. - Our data suggest that short-term creatine supplementation has improved 50 m sprint performance in amateur swimmer and it seems unlikely creatine loading is hormonally mediated.

• 出版日期2011-11